课程: Python: Design Patterns (2021)
Proxy
- [Instructor} Proxy becomes handy when creating a highly resource-intensive object. The problem we need to solve here is postponing our object creation as long as possible, due to the high-resource requirement of the object we're creating. Therefore, there's a need for a placeholder that will, in turn, create the object when its creation is absolutely necessary. Here's our scenario. We create an instance of a producer class only when it's available because only a fixed number of producer objects can exist at a given time. Our proxy is an artist who is checking to see if the producer becomes available for a guest. In the proxy design pattern, clients interact with a proxy object most of the time until the resource-intensive object becomes available. The proxy object is in charge of creating the resource-intensive objects. Adapter and Decorator are related to the proxy design pattern.
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